Distributed generation electricity quantity distribution system and distributed generation electricity quantity distribution method

Abstract

The invention provides a distributed generation electricity quantity distribution system and a distributed generation electricity quantity distribution method. The system comprises a photovoltaic generation device (7), an electricity storage device (6), a grid-connection device (3), a charging device (2) and a controller (1), wherein the grid-connection device (3) is provided with an inversion output device (4) and a rectification input device (5); the controller (1) is used for receiving electricity utilization peak-valley period information from the charging device (2), receiving electricity storage quantity information from the electricity storage device (6), and controlling the inversion output device (4) and the rectification input device (5) according to the information. The method comprises the following steps of a) judging whether the present period is an electricity utilization peak period or an electricity utilization valley period; b) judging the amount of stored electricity of the electricity storage device; and c) deciding whether the generated energy of a photovoltaic system is output outwards or the electricity storage device is charged from an electricity grid according to the judgement. With the adoption of the system and the method, peak-clipping and valley-filling can be performed by adequately utilizing the electricity storage capacity of the household photovoltaic system, so as to supplement insufficient electricity quantity during the peak period, and alleviate the fluctuation of the electricity grid.

Description

technical field [0001] The invention belongs to the field of power supply, and in particular relates to a distributed power distribution system and method. Background technique [0002] The utilization of new energy has become a hot spot at present. In the utilization of new energy, connecting residents' own photovoltaic power generation systems to the grid as distributed photovoltaic power generation points is a potential power generation method. Home photovoltaic power generation systems generally include two parts: photovoltaic cells and power storage equipment. Photovoltaic cells generate electricity during the day, part of which is used by the family, and the rest is stored in the power storage device, and then used by the family at night. However, during the peak period of electricity consumption during the day, it will be more beneficial if this part of excess electricity is supplemented to the grid. Especially in the scorching heat of 2013, the continuous strong su...

AI Technical Summary

Problems solved by technology

However, if the residents fully supplement the electricity to the grid, it will have an impact on the electricity consumption of the residents.

In addition, the electric energy of the power grid itself will also be lost during the valley period of electricity consumption. How to avoid this loss is also a problem

Images